In December 2013,
Fortress Investment Group, LLC, through its subsidiary
Railroad Acquisition Holdings, LLC (RAH) placed a
stalking horse bid on the operating rail lines, which was accepted by the bankruptcy trustee in January 2014. In February 2014 RAH announced that it had formed the CMQ to become the operating entity of the rail lines and that the sale would be concluded in March 2014. CM&Q received its certificate of fitness from the Canadian Transportation Agency on June 24, 2014.[6]

In March 2014, John E. Giles of RAH drove the length of the line, visiting communities and industries served by the railway and inspecting the condition of tracks and installations. He estimated a $10–20 million investment would be needed over three years to repair the rail line, currently in poor condition and not safe for the transport of oil or dangerous goods.[7]

In August 2015, 15 empty boxcars of a CMQR freight train derailed at a siding in Farnham, Quebec.[8]